SUPPLICATION OF A PROPHET, peace be upon him H H 650 "Ibn Mas'ud recalled seeing Prophet Muhammad, praise and peace be upon him, narrating an account of another Prophet of Allah, who, upon being beaten and wounded by his people wiped the blood away from his face and supplicated, 'Allah forgive my people because they do not know.'" R 650 Bukhari and Muslim with a chain up to Ibn Mas'ud who related this.
645- وعن ابن مسعود رضي الله عنه ، قَالَ : كأني أنظر إِلَى رسول الله صلى الله عليه وآله وسلم يَحْكِي نَبِيّاً مِنَ الأنبياءِ ، صَلَوَاتُ اللهِ وَسَلامُه عَلَيْهِمْ ، ضَرَبَهُ قَوْمُهُ فَأدْمَوْهُ ، وَهُوَ يَمْسَحُ الدَّمَ عَنْ وَجْهِهِ ، ويقول : "اللَّهُمَّ اغْفِرْ لِقَوْمِي ؛ فَإنَّهُمْ لاَ يَعْلَمُونَ" متفقٌ عَلَيْهِ .